San Antonio River 300 meters downstream of Ashley Rd.

Measures water acidity or alkalinity on a scale of 0-14. Neutral is 7. Most fish thrive in 6.5-8.5 range.

Common fecal coliform bacteria indicating possible sewage contamination. EPA recreational limit: <126 MPN/100mL.

Amount of oxygen dissolved in water. Essential for fish survival. 6+ mg/L is ideal for most fish species.

Measures dissolved ions and minerals in water. Indicates salinity and pollution levels. Freshwater: 100-500 µS/cm.

Ortho P (mg/L) - a water quality measurement. Contact local authorities for specific safety guidelines.

Amount of oxygen dissolved in water. Essential for fish survival. 6+ mg/L is ideal for most fish species.

Common fecal coliform bacteria indicating possible sewage contamination. EPA recreational limit: <126 MPN/100mL.

Conductivity (µS/cm) - a water quality measurement. Contact local authorities for specific safety guidelines.

Measures dissolved ions and minerals in water. Indicates salinity and pollution levels. Freshwater: 100-500 µS/cm.